diff --git a/app/main/views/sub_navigation_dictionaries.py b/app/main/views/sub_navigation_dictionaries.py
index f043955de..0aba6069b 100644
--- a/app/main/views/sub_navigation_dictionaries.py
+++ b/app/main/views/sub_navigation_dictionaries.py
@@ -112,9 +112,11 @@ def about_notify_nav():
         {
             "name": "About notify",
             "link": "main.about_notify",
-        },
-        {
-            "name": "Security",
-            "link": "main.about_security",
+            "sub_navigation_items": [
+                {
+                    "name": "Security",
+                    "link": "main.about_security",
+                },
+            ],
         },
     ]
diff --git a/app/templates/views/about/security.html b/app/templates/views/about/security.html
index b03e593a4..9ebc0420f 100644
--- a/app/templates/views/about/security.html
+++ b/app/templates/views/about/security.html
@@ -19,15 +19,18 @@ <h1>{{page_title}}</h1>
     <li>manage risks around information</li>
   </ul>
   <p>
-    Notify.gov operates under a full three-year <a href="https://digital.gov/resources/an-introduction-to-ato/"
-      target="_blank">Authority-to-Operate (ATO)</a>. This federal security authorization process leverages security
+    Notify.gov operates under a full three-year <a class="use-link usa-link--external"
+      href="https://digital.gov/resources/an-introduction-to-ato/" target="_blank">Authority-to-Operate (ATO)</a>. This
+    federal security authorization process leverages security
     controls provided by National Institute of Standards and Technology (NIST).
   </p>
 
   <p>
-    Our infrastructure runs on <a href="https://www.cloud.gov/" target="_blank">cloud.gov</a> and utilizes several
+    Our infrastructure runs on <a class="use-link usa-link--external" href="https://www.cloud.gov/"
+      target="_blank">cloud.gov</a> and utilizes several
     services through Amazon Web
-    Services (AWS), including <a href="https://aws.amazon.com/sns/" target="_blank"> AWS SNS </a> for sending SMS
+    Services (AWS), including <a class="use-link usa-link--external" href="https://aws.amazon.com/sns/" target="_blank">
+      AWS SNS </a> for sending SMS
     messages.
   </p>
   <p>For more information about the Notify.gov infrastructure, contact us at <a
@@ -48,13 +51,15 @@ <h3>Data retention</h3>
   </p>
   <h2>Multi-Factor Authentication</h2>
   <p>
-    Notify.gov uses <a href="https://login.gov/what-is-login/" target="_blank">Login.gov</a> for enhanced security.
+    Notify.gov uses <a class="use-link usa-link--external" href="https://login.gov/what-is-login/"
+      target="_blank">Login.gov</a> for enhanced security.
     Login.gov is an extra layer of security created by the government that uses multi-factor authentication and stronger
     passwords to protect your account.
   </p>
   <p>
     To access Notify.gov, users will use a Login.gov account associated with their agency (.gov) email with one of the
-    <a href="https://login.gov/help/get-started/authentication-methods/" target="_blank">multi-factor authentication
+    <a class="use-link usa-link--external" href="https://login.gov/help/get-started/authentication-methods/"
+      target="_blank">multi-factor authentication
       methods</a> offered through Login.gov.
   </p>
 </section>